2014
DOI: 10.1016/j.dsr.2014.06.001
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Impact of depositional and biogeochemical processes on small scale variations in nodule abundance in the Clarion‐Clipperton Fracture Zone

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Cited by 147 publications
(171 citation statements)
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“…1; Table DR1 in the GSA Data Repository 1 ). Oxygen in the retrieved sediments was determined onboard using amperometric Clark-type O 2 sensors according to the procedure described by Ziebis et al (2012) and Mewes et al (2014Mewes et al ( , 2016. Pore-water samples were retrieved by Rhizon samplers, diluted 1:10 and acidified with suprapure 1 M HNO 3 , and stored at 4 °C until analysis of dissolved manganese (Mn 2+ ) at the home laboratory at the Alfred Wegener Institute (Bremerhaven, Germany) using inductively coupled plasma-optical emission spectrometry (ICP-OES).…”
Section: Study Area and Methodsmentioning
confidence: 99%
“…1; Table DR1 in the GSA Data Repository 1 ). Oxygen in the retrieved sediments was determined onboard using amperometric Clark-type O 2 sensors according to the procedure described by Ziebis et al (2012) and Mewes et al (2014Mewes et al ( , 2016. Pore-water samples were retrieved by Rhizon samplers, diluted 1:10 and acidified with suprapure 1 M HNO 3 , and stored at 4 °C until analysis of dissolved manganese (Mn 2+ ) at the home laboratory at the Alfred Wegener Institute (Bremerhaven, Germany) using inductively coupled plasma-optical emission spectrometry (ICP-OES).…”
Section: Study Area and Methodsmentioning
confidence: 99%
“…This indicates that Mn reduction can be a dominant C org oxidation process even at low contents of Mn oxides compared to those found at UB. Manganese enrichments of this magnitude have been reported for several locations on the continental margins and in deep basins (Murray et al, 1984;Gingele and Kasten, 1994;Gobeil et al, 1997;Haese et al, 2000;Mouret et al, 2009;Magen et al, 2011;Macdonald and Gobeil, 2012;Mewes et al, 2014) in addition to the relatively few places where dissimilatory Mn reduction was already indicated to be of importance, as discussed above. Thus, the process may be of more widespread significance, particularly in deep basin settings such as UB that allow geochemical focusing of manganese.…”
Section: Org Oxidation Dominated By Manganese Reduction In the Ubmentioning
confidence: 76%
“…In general, aerobic metabolism dominates the organic matter mineralization in deep-sea sediments that are characterized by low organic matter content (Jahnke et al, 1982;Glud, 2008), especially in organic-carbon-starved deep-sea sediments with low sedimentation rates (Mewes et al, 2014D'Hondt et al, 2015;Mogollón et al, 2016). In contrast, owing to high sulfate concentrations in marine sediment, sulfate reduction might account for up to 50 % of total carbon oxidation in continental margins with high organic matter flux (Jørgensen, 1982;Jørgensen and Kasten, 2006;Bowles et al, 2014).…”
mentioning
confidence: 99%
“…Rather special for the presented data set are the pronounced pit structures, observed throughout the AUV-mapped area with very little to no Mn-nodules observed at the sediment surface. The existence of such accumulation of clay size particles, which are proposed to hinder nodule growth Mewes et al (2014). Another possibility could be that these pit structures are pockmarks, formed by pore water release (Harrington (1985); Hovland and Judd (1988) with a significant change in local pore water geochemical properties and eventually warmer temperature that prevented Mn-nodule formation in the past.…”
Section: Fine Scale Correlation Between Auv-based Bathymetry and Mn-nmentioning
confidence: 99%
“…assuming increased accumulation of sediment in flat or depression areas compared to sloping seafloor Frazer and Fisk (1981); Widmann et al (2014). Local sediment accumulation 15 influences the dominant formation type of the Mn-nodules (diagenetic vs. hydrogenetic), their size and metal concentration Jung et al (2001); Kim et al (2012); Mewes et al (2014); Widmann et al (2014). Detailed small-scale investigations (1m to 100m scale) are not commonly done.…”
Section: Nodule Abundance Estimation In Relation To Benthic Structuresmentioning
confidence: 99%